Merge branch 'support-tf-split' into 'master'

Support tensorflow split op.

See merge request !710

mace/python/tools/converter_tool/tensorflow_converter.py

@@ -96,6 +96,7 @@ TFSupportedOps = [
     'Pack',
     'Cast',
     'ArgMax',
+    'Split',
 ]
 
 TFOpType = Enum('TFOpType', [(op, op) for op in TFSupportedOps], type=str)
@@ -192,6 +193,7 @@ class TensorflowConverter(base_converter.ConverterInterface):
             TFOpType.Stack.name: self.convert_stack,
             TFOpType.Cast.name: self.convert_cast,
             TFOpType.ArgMax.name: self.convert_argmax,
+            TFOpType.Split.name: self.convert_split,
         }
         self._option = option
         self._mace_net_def = mace_pb2.NetDef()
@@ -759,3 +761,21 @@ class TensorflowConverter(base_converter.ConverterInterface):
         op = self.convert_general_op(tf_op)
         op.type = MaceOp.ArgMax.name
         op.output_type.extend([mace_pb2.DT_INT32])
+
+    def convert_split(self, tf_op):
+        # inputs: [dim, input]
+        axis = tf_op.inputs[0].eval().astype(np.int32)
+        axis = len(op.output_shape[0].dims) + axis if axis < 0 else axis
+        mace_check(axis == 3, 'Split with %d axis only support' % axis)
+        input_shape = self.infer_tensor_shape(tf_op.inputs[1])
+        mace_check(len(input_shape) == 4 and (input_shape[3] % 4 == 0),
+                   "The input's 4th dimension should be a multiple of 4")
+        op = self.convert_general_op(tf_op)
+        op.type = MaceOp.Slice.name
+        del op.input[0]
+
+        axis_arg = op.arg.add()
+        axis_arg.name = MaceKeyword.mace_axis_str
+        axis_arg.i = axis
+
+        self._skip_tensor.add(tf_op.inputs[0].name)

mace/python/tools/model_header.jinja2

@@ -25,17 +25,14 @@ namespace mace {
 namespace {{tag}} {
 
 
-const unsigned char *LoadModelData(const std::string &model_data_file);
+extern const unsigned char *LoadModelData();
 
-const std::shared_ptr<NetDef> CreateNet();
+extern const std::shared_ptr<NetDef> CreateNet();
 
-const std::string ModelName();
-
-const std::string ModelChecksum();
-
-const std::string ModelBuildTime();
-
-const std::string ModelBuildOptions();
+extern const std::string ModelName();
+extern const std::string ModelChecksum();
+extern const std::string ModelBuildTime();
+extern const std::string ModelBuildOptions();
 
 }  // namespace {{ tag }}
 }  // namespace mace